On Quantum Leap Season 1 Episode 1, those present include Steve Braiver as Security Guard, Caitlin Bassett as Addison, Raymond Lee as Dr. Ben Song, Michael Welch as Ryan Mills, and Dan Istrate as Horace
Addison: Have you been hiding? Ben: Hiding? No, I was just in a different section of the apartment. Addison: You mean the bathroom where you were hiding from the party you didn’t want to have? Ben: I love parties. Having everyone in here, touching all our stuff. I would’ve proposed way sooner if I knew we got to do this.
